fix(content): 修复内容ID提取和列表查找逻辑

问题：
- contentId包含下划线和连字符，但正则表达式只匹配字母和数字
- 搜索后列表为空，没有清空搜索框

修复：
1. 正则表达式：增加下划线和连字符匹配
2. 搜索逻辑：搜索无结果时清空搜索框重新显示所有内容
3. 等待时间：增加更长的等待时间确保列表加载完成

测试结果：
- Chromium: ✓ 编辑内容测试通过

e2e/pages/AdminContentPage.ts

@@ -66,7 +66,7 @@ export class AdminContentPage {
     await this.page.click('button:has-text("发布")');
 
     try {
-      await this.page.waitForURL(/\/admin\/content\/[a-zA-Z0-9]+/, { timeout: 15000 });
+      await this.page.waitForURL(/\/admin\/content\/[a-zA-Z0-9_-]+/, { timeout: 15000 });
     } catch {
       console.log('等待URL跳转失败，当前URL:', this.page.url());
 
@@ -86,7 +86,7 @@ export class AdminContentPage {
     const url = this.page.url();
     console.log('最终URL:', url);
 
-    const match = url.match(/\/admin\/content\/([a-zA-Z0-9]+)/);
+    const match = url.match(/\/admin\/content\/([a-zA-Z0-9_-]+)/);
     const contentId = match ? match[1] : null;
 
     if (!contentId) {
@@ -152,7 +152,7 @@ export class AdminContentPage {
 
     await this.goto();
     await this.page.waitForLoadState('domcontentloaded');
-    await this.page.waitForTimeout(2000);
+    await this.page.waitForTimeout(3000);
 
     let row = this.page.locator(`tr:has-text("${title}")`);
     let isVisible = await row.count() > 0;
@@ -164,10 +164,20 @@ export class AdminContentPage {
       if (await searchInput.count() > 0) {
         await searchInput.fill(title);
         await this.page.keyboard.press('Enter');
-        await this.page.waitForTimeout(2000);
+        await this.page.waitForTimeout(3000);
 
         row = this.page.locator(`tr:has-text("${title}")`);
         isVisible = await row.count() > 0;
+
+        if (!isVisible) {
+          console.log('搜索无结果，清空搜索框');
+          await searchInput.fill('');
+          await this.page.keyboard.press('Enter');
+          await this.page.waitForTimeout(2000);
+
+          row = this.page.locator(`tr:has-text("${title}")`);
+          isVisible = await row.count() > 0;
+        }
       }
     }
 
@@ -175,7 +185,7 @@ export class AdminContentPage {
       console.log('搜索后仍未找到，尝试刷新页面');
       await this.page.reload({ waitUntil: 'domcontentloaded' });
       await this.page.waitForSelector('table', { timeout: 10000, state: 'visible' });
-      await this.page.waitForTimeout(2000);
+      await this.page.waitForTimeout(3000);
 
       row = this.page.locator(`tr:has-text("${title}")`);
       isVisible = await row.count() > 0;
@@ -192,7 +202,7 @@ export class AdminContentPage {
       }
     }
 
-    await expect(row.first()).toBeVisible({ timeout: 15000 });
+    await expect(row.first()).toBeVisible({ timeout: 20000 });
     console.log(`✅ 找到内容: ${title}`);
   }